SAKRETE 80 lb. Gray Type S Mortar Mix is a preblended mixture of sand and masonry cement or sand, lime and portland cement. For laying brick, block and stone in load bearing walls and below grade applications. It is a contractor grade product that can be used for tuck pointing or repairing existing mortar joints as well as being used for scratch, brown and finish of walls; For use in laying brick, block and stone in load-bearing walls and construction below grade; Ideal for projects requiring structural strength for brick and block foundations;